NEED OVULATION HELP:)

Has anyone ever got pregnant without finding their peak? My last pregnancy i just assumed i had missed my peak because my line was very much darker then what they normally are but still was a little lighter than control and i conceived that month——now I’m starting to test again with a different brand, i just got a test that was darker than the rest but still not as dark as it’s suppose to be and is starting to get lighter now ...... anyone experience this ???